Tool-operating machine.



FIELI.

WITN ESSES @2W/WM' 19.9%

' G. P. THOMAS.

TOOL OPERATING MACHINE.

APPLICATION FILED III-:0.28. 19m.

Patented Mar. 14,1916.

5 SHEETS-SHEET I.

V////MWWW THB COLUMBIA PLAIyOuRAPI-l co.. WASHINGTON. D. c.

G. P. THOMAS.

TOOL OPERATING MACHINE.

APPLICATION FILED DEC.28, I9I4.

lmente@ Mar. 14, 1916.

5 SHEETS-SHEET 2.

FIC-3-2- 151B COLUMBIA PLANOGRAPH' co., WASHINGTON, DA C.

G. F. THOMAS.

TOOL OPERATING MACHINE.

APPLICATION FILED IIIac.28, I9I4.

l 1 75 1 96. Patented Mar. 14, 1916.

5 SHEETS-SHEET 3- 30 Elle-1 WITNESSES THE CDLUMBM PLMIIOGRAPM co.,WASHINGTON, D. c

G'. P. THOMAS. TOOL OPERATING MACHINE l I APPLICATION FILED DEC.2B,I9I4-y y I 1,175,196. Y Patented Mar. 14, 1916.

5 SHEETS-SHEET 4l wlTNEssEs mvENron THE coLuMElA PLANDGRAPH cu.,WASHINGTON. D. c.

mgmm G. P. THOMAS.

TooL OPEATING MACHINE.

APPLICATION 'FILED DEC. 28, 1914. y A Patented Mar. 14, 1916.

5 SHEETS-SHEET 5- WITN ESSES a INVEN-ron 55 nisin of the work-carriage'shown' in? Fig.' '9.

GEORGE PAUL THOMAS, OF GLENSHAW, PENNSYLANIA.

TOOL-OPERATING MACHINE.

ySpecification of Letters Patent. ,l Patented Mr, 14,1916,

Application fried December 2s, i914. seriai No. 879,276,

To all whom t may Concern.'

Be it known that 1, GEORGE PAUL THOMAS,

residing vat Glenshaw, inthe county of Alle-Y gheny and StateofPennsylvania, a citizen of theUnitedj States, have'invented ordiscovered certain new. and useful Improvements in Tool OperatingMachines, of which improvements the following `is a specification. f [jY My invention relatesto tool-'operating machines which are provided.with work-carriages to bring to the tool, andl by successivestep-by-step advances, thermaterial to be operated upon, means beingprovided to adspo Vance the carriage, land stopping mechanism to arrestits movement at predetermined regularor irregular intervals. l

TheJ vobject `of my invention is to. improve kthe carriage driving Vandstopping fniechanism. Y Y

A further obiect is vto provide a simple, efficient, and inexpensiveconstruction wherein the tool operating mechanism and` the carriageeriving and stopping mechanism are so coordinated, that, when themachine has been started a blank of material may be operateduponvwithout further active attention on the part of aworkman. Y

Although not limited to machines for any specific purpose, my vinvention is particularly applicable to machines for punching Vholes instructural steel plates and sections,

and is thus illustrated inthe accompanying sheets of drawings, Vwhich.form part .of my specification. i l

Figure 1 is a side elevation of one form of punching machine embodyingmy invention; Fig. 2 an Aend elevation, the plane of view beingindicated by the line 114-11, Fig. 1; Figs. 3.and4 are side and endviews, respectively, of a modification in driving construct-ion; Fig. 5is a side view to enlarged scale of Vthe driving connections of themachine of Figs. 1 and 2; Fig. 6 a sec-A tional view taken on the lineV1-V1, Fig.-

5, the uppermost pitman connections-being shown in elevation; Fig. 7 asectional elevation, to enlarged scale, ytaken on they line VII-V11,Fig. "2, the housingy for the stopping mechanism being broken away toshow such mechanism;l Fig. 8 a plan view of the stopping mechanism vasshown in Fig. 7; Fig. 9 a side elevation of a second embodiment of onefeature of my invention; and Fig. 10 a plan view of the drivingfmecha-Vneath the punching tools 3.

thev several figures like used'to designate like parts.V

Thepunching mach ne may numerals are Y' beof any' Y Ysuitableconstruction, that shown .in Figs. y

1 and 2"being particularly adapted for platey punching purposes,andcomprising a frame lprovided with a reciprocating head 2, to

which a pair of punching tools 8 are secured.

.TheV head 2 is reciprocated in the usual and well known manner by meansof a rotary-` y lshaftll, suitably connected to, or forming 'a part of,a power' shaft 5. Such shaft is` provided with a pinion 6, meshing witha pinion V7, secured to a shaft'8, 'which kshaft may bedrivencontinuously any desired manner,fas by'a motor 21. A further essentiajldetail of the punching machine consists of'dies y9 suitably secured tothe frame 1-be- The'work-carriage or spacing'table also may be of any'suitable construction. 1n the form shown in Figs. 1 and 2 the materialvto be punched, such as a plate 10, is borne upon a carriage 11,movableupon suitable tracks 12, while in that ofA Figs. 9 *and 10 the. materialis dragged after the carriage. y p While, as far as some features ofmypresent invention are concerned,` any suitable means mayv be employedfor driving the work-carriage or spacing table, the preferred means (andthey form ajpartfoffmy l invention) are characterized bythe fact thatthe driving power continue toO act positively -to resist 'orabsorb the.rebound of the carriage after thestopping` mechanism has fbecomeeective. Furthermore, in order 'to quickly and effectively overcome theinertia of the carriage,'and to release from the dies the material beingoperated upon, when, owing to chill tools or for other reasons, vbursare formed on such material, .twoV driving means are provided, one foreffecting the initial, andthe other the concluding, moverment ofthe'carriage, Vtheformer means being positivev and unyielding. 1n themaioov chine showninfFigs. 1 to 8, inclusive, the 'i carriage-drivingpower is the power` shaft for reciprocatingthe punching tool, and thevconnections interposed Vbetween Vsuch shaft and the carriage arelconstructed to accomplish the ends just stated.V

1n this machineV the carriage is provided valong its longitudinalcenter-line with a rack 13, which meshes with a pinion 14 secured to adriven Vvshaftlf).Such shaft extends through va housing" 16, "inclo'singstopping driven shaft.` There may be a single pawli ,and-ratchetconnectiom'as is shown in Figs.

Y' acts 3 and 4, to be presently explained, or two such connections, asshown in Figs. l, 2, 5 and 6. In the latter, one ofthe connectionspositively to effect the initialjmovement of the carriage, and the otheracts through a and, as shown therein,

yielding member, preferably a friction clutch, to effect the further andconcluding movement; and, in this embodiment of my invention, both areadvance movements. While, Figs. l and 2 is driven by a rack, it will beshown in Figs. 9 and l0 may be employed, understood that a carriage ofthe `type the driving may be through an endless chain.

Vfor effecting an initial positive The pawl-and-ratchet connections maybe of any suitable construction. Having ref.- erence rst to theunyielding connections movement of the carriage, the power shaft 5, asshown particularly in Figs. 5 and .6, is provided withv a pinion 17,which meshes with a secn ond pinion 18,.rotatably mounted on thevpivotally secured at one end, and at its other n frame l. To thepinionlS a pitman 19 is end is similarly attached to an arm 20,rotatably mounted on the shaft l5. The arm 20 is provided with a pawl 22adapted to engage a yratchet wheel 23 keyed to the shaft ,.'gagingposition.

15. Means are provided for'releasing the pawl 22 from its engagementwith the ratchet,y for yieldingly holding` the pawl in :one or anotherof its alternate positions, and

for againthrowing the pawl to ratchet en- For: thus releasing the pawl,it is provided with a-iinger 28, adapted, upon the upward movement ofthepitman, to be tripped bymeans of a stop 29,

,adjustably secured in. a slot-provided support 30. To hold the pawl inits alternate positions, there is provided a thrust bolt 2 6, held, bymeans of a spring 27, yieldingly against a suitable bearing face 24ofthe pawl when the pawl is in operative position, and

nagainst a similar face 25 in the oppositeposition of the pawl. Whenoutof `engagement with the ratchet, it'will be understood. that the pawl22 will be in about the position in which theiinger 28 is indicated asbeing when the pawl is operative. To throw it into operative position. asecond stop 31 is adiustably secured to the frame 30, and

Vagainst which stop the pawl strikes on the downward or return stroke ofthe pitman.

'By such an arrangement the pawl may be rendered active during anysuitable period of the cycleof operation of the machine to advance thecarriage any desired amount.

which" will be fully explainedi as just explained, the Vcarriage of`through a pitman tions are the same.

The pawl-and-ratchet connection'for eff fecting each concluding movementof `the,

. carriage are similar ini general construction 1 end of such pitmanbeing pivotally attached 'to' an arm 34, rotatably mounted on the shaftl5. A driving member,ocmprisinga ratchet wheel 3G and. one member.` ofra.friction Clutch,fis also rotatably mounted ron .such

tion clutch consists of a frame or casing k,37, secured to the ratchetwheel 36 as by bolts .42, and a plurality ofplates 38, rotatable withthey casingv but slidable therein .longitudinally of the Vsha-ft 15.`The secondl memberV of the. clutch consistsof a collar 39, keyedv to theshaft 15, and a plurality of plates 40, alternately arranged with theplates 1738.. The plates 40'v are rotatable with vthecollar 89, butslidable longitudinally of the shaft l5; and, to adjust the pressurev ofthe two series of plates upon each other, suitable springs 41 areprovided.: The arm 34 is pro vided with a lpawl 43, held in engagementwith the ratchet 36 byimeans of a spring 44. As will readily be seen,the two pawls .22 and 43 engage their respective ratcliets 23 and 36 soas to turn them, and hencethe shaft 15, in the same direction. Nomeansare provided to disenga-ge the pawl 43, so

that, during the initial movement of the car-Y riage, the shaft 15 is'driven through bot-h sets of pawl-andratchet connections. The concludingmovement; however, is effected solely through the friction clutch, andthe arrangement is suchl that the driving member continues to act afterthe driven shaft 15 has been arrested, thus beccmingetfective to absorbthe rebound and shock incident to the stopping of the carriage.l

In the driving connections illustrated in ,y Figs. 3 and 4 but a singlepawl-and-ratchet is employed, andV it acts through a friction clutch toeffect both theinitial and conclud-` ing intermittent movements ofl thecarriage. In this arrangement the driving memberconsists of a shaft 45,a ratchet 46 secured thereto. and kone member of a friction clutch 47,similar to that illustrated in Fig. 6. Thel other member of the clutchvdrives a pinion 48, which meshes with avpinion 49, secured to the shaft15a. rIhe 4ratchet 46 is driven 50, secured to the power; shaft 5@L andto an arm 51 rotatably mount-l ed on the shaft 45, and pawl '52 securedto such arm. IWhether the driving connections of Figs. l, 2, 5 and 6,'orthose of Figs. 3 and Y* i' a second pitman 33 f shaft. Thedriving-memberpart of `the fricrebound momentum and shock, both connect. .v

The stopping mechanism for arresting the ,carriage of themachine shownin Figs. land Y2, maybe of any desiredjconstruction( That i shown hereinis similar to the stopping mechanism illustrated and describedinmyUnited States Patent No. 908,819. In the machine of said figures, thedetent, drum,

rather Athan being mounted on la shaft borne yby the movable carriage asin said patent, is

arranged 'to arrest the carriage by stopping the rotation of the drivenfixed shaftl, and means'for releasing the Vdrum-engaging detents andYfor lifting the trip nger are coordinated with the power vshaft, sothat the entire machine continuesto operate automatically andintermittently until a complete line of holes hasfbeen punched intheblank of material. Howevenit will be understood that thestopping'mechanism may .beY such as is shown iii/Figari) and 10, thecarriage being driven in the manner alreadyy explained;

In the stopping mechanism shown par- .ticularly in F igs. 1, 7 and 8,the detent drum A53 is secured directly to the shaft 15, and a pluralityof pawls v54 are rotatably mounted on a shaft 55. -To prevent injury tothe ,machine by the shcck ofthe stopping impact,the shaft 55 is mountedbetween the upper ends of a pair of levers 56 56a rotatably mounted on ashaft 57, the otherends of such levers being secured to 'ay rod 58, towhich in turn there is attached a'rod 59 engaged by one end of .a stiffcompression spring 60,. which abuts at its other endl against thehousing 16. As in the above lmentioned patent, the openings in the pawls5,4A t0 receive the shaft 55 are somewhat larger than the diameter ofsuch shaft, and

lingers 61 61a pivoted as at 62,and acting under the tension of springs68, holdsl the pawls forwardly. A second pair of pivot- :ed leversA64.61a is provided to hold the pawls 54 from engagement with the detentdrum,

4arms 70 and 70a, which are secured to a shaft 71. lThe end 0f the rodv691 adjacent to the carriage 11 is provided withY aV trip finger 79.,which lies inthe path of suitably vspaced tripping elements v76 whichmay be of various forms, as illustratedin my Patent No. 835,123.1and aresecured to the carriage 11. The otherend ofthe rod 69 has securedthereto a depending arm 73, attached by means of a linkl74 to a secondarm75,' se

curedV totheshaft -'I`hus, when a trip- Vping 'element up0n theadvance.of the carriage @engages the finger`72,l such fingerisV movedyto Aturnthe'rcd 69, which, through arm 73,"link 74', Aand arm 75, turns theshaft 67, which lshaft Vinturn moves 4thev fingers 64:, 64a toreleasethe llatch 65, vpermitting the pawlsvto drop intoengagementwith'the drum. .Y

To disengage or "release/the pawls 54: from thedrum 53, the shaft 71,which is rotatablyl mounted insuitable bearings 35, 35a, secured totheframe l, -is provided with arms; 85 Sfrom the outer ends ofwhich" aresuspended links 86, 86a.; A rod 87-exA tends'between the lower` end ofsuch links and'i below the` series-of pawls 54.- rThe shaft 71 visfurther provided with an arm 77, ccnnjectedby a link 7 8 to a second arm79, secured'to one endof a shaft 80, which shaft is rotatably mounted'invbearings 81,

81a, secured to the frame 1. :Attached to- Vthe other end of this shaftis an varm 82, vprovided with a roller 83, which bears on ,a cam 84secured to the-shaft 4. The projecting portion of the cam 84 is in suchvpo- Vsitionupon the shaftfl that substantially' at the. end of thepunching operation, and

before the driving mechanism has become effective, arm 82 will beraised;and-the rais- 79, iink 78, arm 77, shaft 71. arms 85, 85a, links86,86a,and rod 87, be eiective toraise the pawls 54 from their engagementwith the drum 53 (such drum-engaging position being indicated in dottedlines vin'gFig. 7),

`ing of'thisarm will, through shaft 80, arm

tothe position indicated in full lines. Furthermore such rctaticnof theshaft 71 is effective,fthrough arms 70, 70a, to raise the rodl 69, andhence the trip finger 72 above the engaged .stopping element .76..- Inthe `furtherrotation ofthe shaft the connections foriraising thepawlsan'd trip nger returns to the positions in Fig. 7, andy in*readiness for the next stopping of the car- Ariage.

- For'further detailed. .explanation of the construction and operationofthe stopping `mechanism reference may be had to my earlierlPatentsNo.835,123and No. 908,819. The features of novelty of my presentconstruction as compared to the ldisclosures of .`these.patents, concernthe pawl and tripfinger release mechanism, and its cordinaten with thepower shaft andgcarriage driving mechanism. l

After the completion of a `punching op@ eration the carriage .may bemoved rearwardly by means of a motor 88, which may be mounted on thevhousing 16,v as shown in V Figa 2; A'cog wheel 89 is'rotatably mount?ed on'the driven shaft 15, and is provided 4with clutch teeth adapted toengage a clutch sleeve 99, rotatable with the shaft 15 Vbutlongitudinally sldable thereon, as by means of the hand lever 91. Asuitable chain 92 vextends' between the power shaft of the mon tor andthe wheel 89, so that by moving the collarV 90 into engagement withysuch' wheel, and releasing thepawls and 43 of the driving connections,the motor may berun to move the carriage rearwardly. As an alternateconstruction, the motor for effecting the rearward drive of the carriagemay be mounted on the carriage itself. This may be accomplished, asinthe machine of Figs. 9 and 10,- by a motor 104 acting through thedriving connections therein illustrated, and to be presently described.

Before describing the constructionv of the modification shown in Figs. 9and 10, the

operation of the above described Vmachine will vbe explainedT Vhile thismachine may be used for punching evenly spaced holes in structuralblanks, such as. the plate 10, it is particularly adapted topunchirregularly spaced holes. In :setting up the machine for aparticular spacing, the shortest and the longest spacing intervals arefirst ascertained; Vhen `the drivingr connections of Figs. 1, 2, 5 and 6are employed, the pawl stop 29 is set in the frame 30 at such a pointthat the pawl v22 will be released fromthe ratchet 23 before the.carriage has been driven a distance equal to the shortest Spacinginterval; and the radial' distance from the center of the shaft 5 to thepoint vof connection ofthe pitman 33 to the crank arm 3.2 is so fixedthat, after the pawl 22 has been released,'the carriage will be driventhrough the friction clutch a distance greater than f the differencebetween the largest spacing interval and the" distance the carriage isdriven by the unyielding driving connections, that is, through pawl 22.By such adjustments only the yielding driving' connections will, at theend of each spacing interbound momentum of very heavy movable carriagesmay be effectively absorbed. In

case the driving connections of Figs. 3 and l are employed the onlyadjustment necessary is that of the connection of the pitman 50 tothecrank arm of shaft 5a. This conne'ctionl should be such as to drive thecarriage a distance greater than-the longest spacing interval.

In outlining a complete cycle of opera.-

that the stopping lmechanism is inl inopera- 'tive positionand the:punches withdrawn a distance less than the'sho'rtest spacing-inyand'rack13', effectivey to drive the carriage:

terval. The pawl 22 "is thenreleased'r(theV nger 28 striking'thestop 29)5 yand the sec- 1 ond period of rotationof 'shaft i5 drives thecarriageto the-end; of the spacing interval,

the connections to the shaft 15 being through l i crank arm 32,*pitman.33, arm 34s,;paw'l 43,V ratchet 36 and the friction clutch vmembershown in` Fig. 6. V,The advancing carriagey then causes astoppingelement .76 to trip the finger 72, which, through rod 69 arm',

linkji, arm 75, shaft 67, and levers 64,2 64a, l moves the latch 6 5`from engagementfwiththe pawls 54,1 thus causing the pawls to drop .yinto engagement with, and ypreventfurther rotation of, the detent drum`53. The -fnrf ther action ofthe carriage driving connect" tions throughthe friction clutch becomes effective to absorb the rebound of thecarriage. The third period 'of rotation of shaft 5 is effective, throughythe shaft t to bring` the punches 3 into operation upon the plate y Thefourth` and last period of the single rotation of lshaft 5 causes thepunches 3 to rise, land' efectsva. release of thestopping mechanism.lThe last mentioned step is accomplished thr tion of cam 8 4', armf8`2,shaftlSO, arm 79,H

link 78, arm 77, shaft 71, arms 85, a 'and rod 87 such rod being raised4to liftfithe'L pawls `54. At the same time, therotationl ofthe shaft 7lisy effective, lthrough arms 70, 7 Qab and rodl69, tolilftthe trip`finger 7,2 over the engaged stopping .element. This position of thestop-'releasing mechanism l. is

partlyillustrated 1. the projec-` tion of the cam Stipasses the roller83Aofv the' stopping irrechanismA is again in readiness for the nextarresting of the carriage.` In Figs. 9 and 1Q thereis shown a differ-`ent form of tool-operating machine wherein two means are provided formoving the worklcarriage, `one of such means ,being positive andunyieldingy and adapted to effect the initial movement,and theotherdriving means actingthrough a yielding, member and adapted to effect theconchid-r` ing movement and to absorb the rebound of the carriage. l Thepunching'machinemay be of any suitable or wellr known construc-v sol fugh the projectingipofry y ros tion, that shown herein consisting-of aframe 93, in which there is af punching head :951,: providedwithpunching tools 95, and adapt-l edp'to be recipro'cated bythe rotationoffV a. shaft196. Thefspacing'carriage, instead gof being-driven by a'finedv shaft .as in the m'aing mechanism movable With the carriage, andthe material to be punched is secured to and' trails after the carriage.Itl Will be unnecessary to explain in detail the driving and 'stopping'mechanism2 of the carriage shown Vherein for they are fully described inmy United States'Patent No.11',068,465.

lt is sutlicient to state that thefsuppoi'tingV vwtable 103 is providedv'with tracks97 for the "carriage trucks l98 WithV a de'teifit bar 99adapted to Vbe Vengaged by 'the pawls 100Lof the carriage, land witharaclrj 101 engaged by a driven pinion 1027of the carriage. The Y`driving of the carriageis. accomplished by lifmeans of a motor 10t,connectedfbya chain 105 toa shaft 106, Whichis provided with a magneticclutch 107 and a Vfriction clutch 108. The driven member of the frictionclutch is effective through pinion 109 and 20110, shaft 111, pinions112, and`113, andV shaft r114, to drive the pinion 102. c

VlVhile broadly the machine shown in Figs. 9'and`10 illustrates variousmodifications of carriage driving mechanism, as explained in connectionWith the description of the machine of Figs. 1 and 2in a more specificaspect 'y the improvements Y of these' figures consist in the provisionof unyielding means ,Y for eecting' the initial movement of acar-vriageprovidedwith yielding driving means.

iVhile various arrangements may be provided for this purpose, itisupreferred that theunyielding drivingl mechanism be coordinatedWiththe rotation of the punch l *power shaft 96'.v In-themconstructionlshown herein Zthe lower side of the carriage frameV 115/ is providedWith a depending frame 116 adapted to be secured to an endless chain n117, extending substantiallythe full lengthV -of' the'spacing table,'anddriven by means of pawl-and-ratcliet mechanism connected to the shaft96. The chain passes over tivo cog Wheels 118 and 119,'fsuitablysupported at' `-opposite ends of the table. l `4.5"chain taut, the wheel1181s mounted at one n To keep the end of a lever .1.20, p ivoted as at121, and having itsother end held'yieldingly tovvard theV punchingmachine by means of 'a spring 4 122. The cog Wheel 119 is secured to alroi n tatably mounted shaft 123, to which there is secured 4a ratchetvWheel 121.VV Adjacent to such ratchet, and rotatably mounted on theshaft 123, is an `arm 125, provided with a Y, vpawl 126. adapted toengage the ratchet124, gx and to which armthere is secured one end of aYpitinan 127,-adjustably-connected at its other end to a crankl arm129,secured to the shaft 96. As already explained, the', pavvl# and-ratchet*driving mechanism is provided '60 to effect an unyielding initialadvance of the carriage at each spacing interval,"the pur'- Vpose beingto positively overcome the initialV inertia and theresistance to thecarriage due t to' bursY formed on the material when 5I-punched. .Meansaretherefore provided `to `from the spirit ofvmy lrelease the paWl126HfrfoiiiV the ratchet` 124:1

before the carriage has been driven a distance equal to the shortestspacing interval. For such purpose this paWl may be 'controlled the sameas the pand-22 of Fig'. 5, and such mechanism, althoughrindicated in,Fig. 9, need not be again explained.

In theoperation of this machine,gas far as Y concerns theconstruction'specifically illus?. trated', fthe initial unyieldingdriving of the carriage is' effected through the-fp'awl-and-V ratchetVconnection and the chainv 117. y The Y cordination of theseconnectionsvvithjthe rotation of the shaft 96 is 'such thatthe'cfar- 1,riag'e' 'is moved "uponftlie Withdrawal ofV punches rfrom thevmaterialbeing punched.- The operation ofthe driving means mount- Ved onthe carriage is fully described in said Patent No.1,0,68,456V and neednot' behere repeated. Itis' sufficient to, state that the motor 104 runscontinuously, and that'the powerV therefrom is transmitted 'tothe pin'-`ion 1.02 through the magnetic clutchl07 and the yielding frictionclutch, 108,1 and AV that when the carriagefis stopped andthe circuit ofeffecting a rearward o-r return drive of the carriage. 1t will belunderstood, hoyvlxV ever, thatvarious other modifications of.con'

es' t struction and'arrangementmay be used by those skilled in 'the art,vvithout .departingv invention as de nedin t the appended claims.V Y YVThis application is, as far'as' there `is common subject-matterinvthe'tvvo ca'sesfaV continuation of my vapplication Serial No.: 841-,331,tiled May`27 th, 1914; In' said earlier application I disclosedy a'machine substanf tially the same as thatshovvn particularly in Figs. 1and 2 of mypresent application, but. differing therefrom in that itydid'nct in clude a secondpaWl-and-ratchet` 'connection Y for effectingan initial unyielding starting of the carriage, ri.or did it include thevfull detail construction of the stoppingl mecha-Y nism. Y

. V`I claim as my invention: -i

' 1. In a tool-operatingimachine, the combination of a movableWork-carriage; ar ro-V tating'power shaft, operative drivingl con-Anections between'saidl power shaft and the carriageincluding a drivingmemberposif tively and unyieldingly rotatable by-said' power shaft,fanda driven shaft; a'yielding' A spaces 3 clutch connecting saidl member tosaid driven shaft, andcarriage stopping meansoperative while saiddriving inemoer continues to' rotate. o

"2. AIn a tool-operating machine, the coin- `4bination of a movablework-carriage, a con- *driven shaft for moving the carriage, a

yielding clutch` connecting said driving member to said driven shaft',and means op-A erative to stop said carriage andA driven shaft whilesaid driving member continues to rotate and through said clutch toabsorb the rebound of the` carriage.

3. Ina tool-operatingmachine, the conibination of a movablework-carriage, a fconltinuouslv rotating power shaft, a rotatabledriving memberfpawl and ratchet connec-A tions;'between i said powerAand driving lmeinber'impartingan intermittent rotation to the latter, adrivenshaft for moving the carrivage, a yielding clutch connecting 'saiddriv-y ing member to driven shaft, and carriagel stopping". Yrneai'isloperativer to arrest the movement of the arrilg While the drivingmember 'continues 'tofrotate Y 4,-' In a tool-operatingmachine, thecombin'ationpfa movable work carriage; termittentlv acting meansVeffective, when thefmovement of the carriage is unrestrained, tdY drivethe carriage vpredetermined equal A and means for stopping said carriagebefore it Vhas moved through one of said'spaces, the continued. actionof the driving means thereby becnning` effective to absorb .the rebound:movement ofthe carriage "5- In ,a tool-enemies machine, the cembtletenwith a tool, a Workarriage, and' a power shaft; of` operative,connectionsA from said-shaftto the tool, a stopping mechanism .A forsaid carriage, and operative connections from said power shaft to saidcarriage,svaid last named connections being effective toy drive thecarriage when 4said stopping mech,- anism is inactive and to yabsorb therebound Vmomentum of lthe carriage when the stopping mechanism isactive.

. 6, Ina tooloperating machine, the comf binaltion` with a reciprocatorytool, a work carriage, and al nower shaft; of operative connectionsfromSaidshaft to the tool for e' an intermittent reciprocationthereof,` operative connections from said power shaft to` said carriage for;intermittently advancing it, stopping mechanism for arresting the ad-`Vance of the carriage, and operative co-nneo tions from said. powershaft to the stopping mechanism for releasing, said mechanism;

'7. In a tooi-operating machine, theV com,- bination with a tool, awork-icarriage, and a power shaft; of operative connections from;`

said shaft toy the tool for reciprocating it,.

operativey driving connections from said Lf shaft to said carriage andincluding a rotarvl; shaft, means effectivenp'o'n .the advance of 1 thecarriage for engaging and stoppingsaid rotary shaft, and operativeconnection from said power shaft to said stopping means for n releasingsaid means.

'laV

8. "In a ytool-,operating machine, the coin-kl bination with a tool, awork-carriage, and a f power shaft; of Aoperative connection from; said'shaft to, and for the. reciprocationiof, said tool., ydrivingconnections from saidi shaft to said carriage and including a rotarydriven shaft, a datent drinn scoured to saiddriven shaft, stoppingpawlseffective -u'poii the @Ob/"alice 0f the 'Carriage for engaging; saiddrum to arrest the movement of the carriage, and connections from saidpower x shaft to, and for releasing, said pawls.

9. In 'a tooloperatingmachine, the com.- binationV with a'tool,a"movable/iwork-canriage, and a power shaft; of tool-operating;connections from said shaft to the tool, 'opfl erative drivingconnections. from said shaft to said carriage for. advancingvit,stopping mechanism for the carriage and vincludinf'j a trip lingeradapted to beengaged bythe adi-v vance of the carriage,`and`meansoperated by said power shaft for releasing said'finger;

10. In a tool-operating machine, the oom?. bination with a tool,kafmovable :work-care riage, and a power shaft of tool-operatin`g3-,connections' from said shafts tothe tool,eop7`i eratv'e drivingconnectionfrom saidshaft toy Said carriage and "fini/:lading arcitjary'`l shaft, `stoppingl mechanism. adapted ,tov en# gagefand stoplsaid shafj ;',"'a, trip finger. enf gageable bythe advanceV of thecarriage and adapted to render the stopping mechanism e Vec'tiv`eand a.single means 'operated byr. saidpower. shaft forreleasingisaid stoppingmechanism and tripy fir'ige'.'V

ieg i 11; In a tool-operatingimachine,.lthe comf binlation with ka tool,a4 moVahleworkfcari.-y riage, and a power shaft;l of lah-rotatable;ldriving. member, ,meansl coordinated (with,

the power shaftffor,intermittently'rotatingA bination Vof a movable,work-carriage, un?.v

yielding drivingV connections for effecting an initial movemenh andyieldingA ldriving 1 connections for Y effecting:-Y a :further Inova-gment of said carriage.

137i 11.1 a tool-operatingmachine, the. coin-f bination of a movablework-carriage, means for effecting an initial movement, and separatemeans for effecting a further movement of the carriage.

14. In a tool-operating machine, the combination of a movablework-carriage, unyielding means for eecting an initial movement, andseparate yielding means for effecting a further movement of thecarriage.

15. In a tool-operating machine, the combination of a movablework-carriage, unyielding means for effecting an initial, and separateyielding means for effecting a concluding movement of the carriage, and

means for rendering the unyielding movingmeans ineffective during suchconcluding movement of the carriage.

16. In a tool-operating machine, the combination with a tool, a movablework-carriage, and a power shaft; of tool-operating connections fromsaid shaft to the tool, operative and unyielding connections from saidshaft to said carriage for effecting an initial movement thereof, and afurther means for effecting the concluding movement of the carriage.

17. In a tool-operating machine, the combination of a movablework-carriage, a power shaft, a driving shaft effective to move saidcarriage, positively acting means Vcordinated with said power shaft toeifect to give it an initial rotary movement, and a t second andyielding pawl-and-ratchet connection between said power and drivingshaft to give it a further rotary movement.

19. In a metal-punching machine, the combination of a reciprocatorypunch, a. movable work-carriage, stopping mechanism for said carriage,unyielding'means for giving said carriage an initial movement after anoperative stroke of said punch, and yielding means for further advancingsaid carriage.

In testimony whereof I have hereunto set my hand.

' y GEORGE PAUL THOMAS.

Witnesses:

PAUL N. CRITCHLOW, FRANCIS J. ToMAssoN.

Copies of this-patent may be obtained for five cents each, by addressingthe Commissioner o1' Patents,

, Washington, D. C.

